Related by context. Frequent words. (Click for all words.) 67 syngas 61 scrubber 60 FGD 58 gasification 57 selective catalytic reduction 55 steam generator 55 coal gasification 55 NOx 54 sulfur dioxide 54 exhaust gases 54 supercritical 54 scrubbers 52 Gasification 52 heat exchangers 52 steam turbine 52 cogeneration 52 gases 52 carbon dioxide CO2 52 glycol 51 electric arc furnace 51 fly ash 51 gasifier 51 combustion 51 SO2 51 sulfuric acid 51 amine 50 IGCC 50 coal fired 50 steam generators 50 heat exchanger 49 biomass gasification 49 integrated gasification 49 tailings 49 CO2 49 petroleum coke 49 biomass 49 nitrogen oxides 48 boilers 48 ammonia 48 autoclave 48 compressor 48 carbon dioxide 48 refrigerant 48 heap leach 48 biogas 48 steam turbines 48 sintering 47 alkali 47 pyrolysis 47 effluent 47 hydrolysis 47 sulfur dioxide emissions 47 electrolytic 47 effluents 47 organic solvents 47 oxidizer 47 sulfur 47 filtration 47 dewatering 47 Cogeneration 47 nitrogen oxide 46 cement kilns 46 anaerobic digestion 46 condenser 46 slurry 46 condensers 46 suspended solids 46 NOx emissions 46 polymerization 46 particulate emissions 46 turbine generator 46 powder coating 46 compressed air 46 hydrochloric acid 46 wastewater 45 chlor alkali 45 evaporator 45 hydrocracker 45 nitrogen 45 coal 45 anode 45 cooling towers 45 Fischer Tropsch 45 leachate 45 pollutants 45 recirculation 45 reverse osmosis 45 pulverized coal 45 methane 44 aqueous 44 methanol 44 slurries 44 anaerobic digester 44 MOX fuel 44 smelting 44 adsorption 44 cogeneration plant 44 olefins 43 sodium hydroxide 43 solvents 43 thermoelectric